JPS59501539A - Method for selectively separating base metal sulfides and oxides contained in ore - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Field of the invention: Method for selectively separating base metal sulfides and oxides contained in ores The present invention relates to a method for ore beneficiation by flotation. More specifically, the present invention provides base metal sulfur oxides and/or partially oxidized sulfides (hereinafter such mixtures are referred to as mixed sulfides) (referred to as m1xed 5 ulfides)) to pH control such as alkaline and acidic direct or linear suppression and selective flotation (hereinafter referred to as continuous flotation) in the absence of agents. It can be used normally or without incurring the cost of base or acid additives. Allows higher grades and returns to be increased by 1. The method of the present invention is applied to base metal ores. Not limited to ore beneficiation, but also non-metallic materials such as coal that contains base metal mixed sulfides as a minor component. It is also extended to the processing of other ores, including ores and rocks.

Background of the invention Economically important base metal ore deposits usually contain mixed sulfides throughout the world. . The usual method of beneficiation of such ores is metal sulfidation, which depends on the properties of the individual ore. This includes flotation of most of the material and continuous selective flotation of the or each metal sulfide. usually, Oxidized sulfides are selectively recovered from unoxidized sulfides.

(゛Continuous flotation′°). Sulfides can be removed by pretreatment with a sulfurizing agent (5uNidizer). Since the surface of the sulfide is made hydrophobic, it is easily floated away.

After such pretreatment, the oxidized sulfides can be recovered by flotation.

Normal selective flotation of mineral sulfide particles is due to the size required to free them. Polishing ore, producing ore pulp, suitable inhibitors, activators, capture Addition of foaming agents and foaming agents and continuous flotation in multiple stages are required. .

Sulfuric metal minerals are constituents of some of the most common base metal ores.

Metal sulfide minerals are difficult to suppress quickly and are usually treated with relatively high alkaline media. The presence of metal sulfide minerals in flotation is undesirable because of the need for minerals. As a result, large Many industrial-scale flotation separations involve adding pH-adjusting agents to the pulp, such as lime, sorter ash, etc. It is carried out at alkaline pH (hereinafter referred to as ``alkaline flotation'') by adding Ru. Unfortunately, alkaline flotation can significantly deplete such regulators. pl-(neutralizing agent) is often required in a later step, and the equivalent level of the pH neutralizing agent is It will be consumed. Additionally, due to its high alkalinity, it is often combined with other valuable ingredients. The use of large amounts of activator and scavenger reduces the selectivity and effectiveness of the separation. This is necessary, and results in an increase in the cost of immediate burial.

The widespread use of highly alkaline flotation media has resulted in the addition of 471 sulfuric acid to such media. The floating behavior of monsters has been the subject of extensive research.

The research covers a large amount of such flotation positioned from both theoretical and practical perspectives. This has resulted in the literature. For an overview of published research on this topic, please see Leisure. ``LejaJ, 1982 Mujinin Llmaru'', p. 1.642-659 Rhenium Press New York and S taff 1982 ball- 111Z Ni, Mining Engineer Volume 34 3@, 48.275-279 See pages 377-381. However, relatively explicit research has shown that pH-adjusting agents Flotation of sulphides in the absence is determined primarily by the specific ore composition and the quality of the water supply has been devoted to.

Soluble cyanides (such as sodium and potassium) and sodium sulfide, sulfide Soluble sulfides such as hydrogen, polysulfides, etc. are subjected to alkaline flotation in the usual manner. used. Cyanide is used as an SR chloride and inhibitor. soluble sulfide (a) as a sulfurizing agent for oxides and oxidized sulfides Flotation): (1)) Bulk flotation and/or after reduction to sulfides for inhibitors (before selective flotation), (C) as a capture agent released subsequent to capture of the flotation fraction. used. If sodium sulfide is used, for all above uses The required amount of sodium sulfide is about 1,000 (J, /lon) per ore. or more.

Dilute solutions of sodium sulfide (e.g. 0.1 M) have historically been used by researchers to In order to carefully adjust the experimental conditions, as required for basic research and sulfidation. Microflotation polishing to displace elemental sulfur and other surface oxidation products from minerals It has been used to pretreat mineral surfaces prior to research. However, that Such surfaces are thoroughly washed with water before the microflotation test is actually performed.

Y, Nakahiro (Y, Nakahiro) carried out such basic research, Effect of Soda Sulfide on Impairment of Copper Activity in Zinc Ore odium S ulfide on the P reven mouth on of CopperΔactivation for 5phalerite) Me m, Fac, Engr.

Kyoto Univ, Part 4. Oct, 1978; 24 1- 257 pages were conducted. It is the influence of sodium sulfide and /' on the copper activity of sphalerite. Or, it was a study on the effects of sodium cyanide. The materials being tested are extremely Pure copper/zinc sulfide with additional quartz, galena, pyrite and It has been treated to remove impurities and other impurities. The results are carefully adjusted. Small amounts of sodium sulfide were effective as sphalerite inhibitors in the samples and systems tested. It has been enhanced by the copper ion chlorination action of sodium cyanide. death However, this effect was l)H dependent. The author recommends that water with a pH above 8.1 It is recommended to separate copper from zinc using alkali. Thus Nakahiro's research is of limited scope and application and thus improves selective flotation. It is mentioned that I)H regulation is advantageous.

U.S. Patent No. 1,469,042 to Hellstrand 7, issued on September 25, 1923, for lead-iron (or lead-iron copper) concentrates. (non-selective) for bulk flotation and to accelerate the flotation of the concentrate components. gate of the wet polishing stage to prevent zinc flotation (activate but not inhibit) from 1 to 7 bonds of sodium sulfide per ton of milled feed. Therefore However, this is not a true selective flotation process as it only removes one metal component at a time. It is involved in the flotation of metal components and removes them before flotation of other metal components. the Above, the amount of sodium sulfide used is even higher than in the process of the present invention. The Healthland method uses oxidized sulfides (not simultaneous e.g. continuous flotation). and although the term mixed sulfide flotation is used in this patent, It implies simple flotation of sulphides of some metals, e.g. bulk beneficiation It is known today in the industry as a product.

U.S. Patent No. 1,916,196 to Ayer, July 1933 Published on the 4th, for example, soluble sulfides such as sodium sulfide Simultaneous flotation of mixed copper sulfides (sulfides, oxidized sulfides, and carbonates) using Process-oriented. As an additive under the conditions at that time, along with other sulfiding agents. The purpose is to carefully adjust the range of <I)H to 4.8 to 6.5. its recovery as sulfide and precipitation of copper ions from solution; All metals are bulk flotation of mineral particles.

One method is to reduce the cost and/or increase the effectiveness of selective base metal ore flotation. particularly large capital expenditures, i.e. the construction of new facilities or the replacement of existing facilities. The idea was to avoid requiring such extensive changes. Therefore, one person The method reduces the number of flotation steps, reduces reagent consumption, and increases flotation selectivity. it was thought.

Purpose of invention The purpose of the invention is to make it possible to eliminate the use of pH regulators such as lime and acids. The present invention provides a method for concentrating ore by flotation without adjusting the pH of the ore.

Another object of the invention is the preparation of base metal mixed sulfur at natural pH values (e.g., unregulated). The present invention provides a continuous selective flotation method for compound suppression and selective flotation.

Other objects of the invention are to reduce the cost of process reagents, equipment, and improve process selectivity and of individual metals, combined sulfides without sacrificing product grade and recovery. This provides a comprehensive collection method.

Another object of the invention is the absence of pH regulators (alkali and acids), which makes it possible to maintain reagents (capture agents, foaming agents, suppressants, activators, etc.) and existing equipment and plans. The proposed method provides a method for recovering base metal mixed sulfides using the same facilities.

These objects of the invention will be apparent to those skilled in the art from the following description, accompanying drawings, and claims. It will be something like that.

Summary of the invention The present invention consists of a method for separating ore components by flotation. The ore is polished to form a sulfide ion and cyanide ion pulp. The concentration of sulfide ions is sufficient to suppress base metal mixed sulfides. at least to a sufficient level, but insufficient to substantially activate the metal sulfide minerals. The concentration of cyanide ions is adjusted to a level that is necessary to suppress the cyanide ion concentration by the flotation described above. to a level at least sufficient to supplementally suppress the mineral content of the ore mentioned above. However, the sulfide ions are adjusted to a level insufficient to suppress the mineral content. and cyanide ions are introduced into the pulp at a given time and in a given succession. It is the law.

Detailed description of the invention FIG. 1 shows a schematic flow sheet of the flotation method for base metal mixed sulfides according to the present invention. In relation to Figures 2 and 3 showing a schematic flow sheet for the flotation process of copper sulfide A detailed description will be given of a preferred embodiment.

Complex base metal ores consisting of mixed sulfides, calico materials, etc. are subjected to conventional crushing; It is then moistened in order to change it to the size necessary to free the particles of valuable metal components. Polish to fine particles using a formula.

This wet polishing step is carried out in one or more steps using conventional equipment (rods, poles or Processed to produce ore pulp ("orepulp") using a flour mill. Understand. The pre-flotation conditions according to the present invention start as early as the wet polishing stage, and Slightly before polishing, successively ending at the latest before the first flotation. Wear. In Figure 1, the pre-flotation conditions include the T stage and ■ stage, and the flow of Figure 1 is as follows. Contains the portion of the diagram from point 1 to point 2.

One aspect of such pre-flotation conditions is that a small amount of sulfide ions (Cleanser 7. The main inhibitor) is added to the ore for better mixing and surface treatment during the wet polishing stage. Most preferably before introducing certain other additives into the pulp to achieve contact. Yes. At this wet polishing stage, the addition of a water-insoluble scavenger often reduces the total scavenger (desirable for reducing cost and generally does not affect the action of sulfide ions).

An aspect of the pre-flotation conditioning pond of the present invention is that a small amount of cyanide is added during pre-flotation conditioning. is added to the pulp. Cyanide ions are preferably added after wet polishing. Delicious.

Typically, specific amounts of sulfides and cyanides are used, but their introduction Continuity and time as well as in each case the special properties of each ore (metallic and non-metallic composition) and the quality of the water used for this treatment (mineral content and temperature). It should be noted that this is selectively determined. Thus many base metal sulfide ores The sulfide ions are preferably added first during wet grinding, followed by pre-flotation. 1]0 cyanide is accumulated during the rest under one condition. However, cyanide , also added at the same time as the sulfide or immediately after the end of wet polishing. or added even before or in multiple stages of sulfide addition. be able to. Therefore, experimental Consideration of indoor batch flotation should be undertaken. These tests are the first attempt. Concentrations of sulfide and cyanide in shellfish and shellfish were found to be appropriate for the same ore in previous experiments. This is done based on the a degree that shows that. Or if you don't experiment beforehand, The general range disclosed herein can be used at various concentrations until a trend is established. This is done based on the surroundings. to produce optimal results such as increased flotation selectivity, recovery, etc. The trend is followed until a suitable concentration range or concentration is found.

Suitable sources of sulfide or cyanide ions include process step 1 directly in the cow or such as releasing sulfide ions or cyanide ions into aqueous solution according to the reaction. Sodium sulfide and hydrosulfide are preferred. Most preferred is sodium chloride. Sodium cyanide and soluble cyanide Potassium cyanide is preferred, and sodium cyanide is most preferred.

During step 1 of Figure 1, the addition of sulfide ions is carried out to clean the ore particles during polishing. It acts on The cleaning process involves selectively converting the surface of mixed sulfide particles into G2M. , which helps prevent oxidation of freshly exposed surfaces. This will be done at a later stage Promote the flotation ability of mixed sulfide particles between. Sulfidation, the second reason for its addition The ability of sulfide ions to move as the main inhibitor of It is increased by its addition.

10 The action of cyanide ions is thought to complement and complete the action of sulfide ions. This is believed to increase the selective auxiliary inhibition of desirable minerals. addition Therefore, cyanide ions serve to complex metal ions in the melt.

As mentioned above, for base metal sulfides, it has a surface cleaning effect and suppresses the main mixed sulfides. The release of sulfide ions required to obtain both effects is the same as for water quality. ) mostly depends on the characteristics of the ore. If sodium sulfide is used as a source of sulfur 1 arsenide ion, If lithium is used, the amount required is usually around that for most base metal sulfide ores. The range is between 20 and 200 g/lon. (Small amounts of sulfide ions suppress It is ineffective as a disinfectant (in smaller amounts it is not effective as a surface cleaner), Too much sulfide ions consist of sulfide, the main pyrite, if copper, They are generally not amenable to selective flotation processes, but economically They are unattractive and would make their activation premature. mentioned above The amount of sulfide ions for each specific application can be determined by batch flotation tests as described above. be optimized. Minimum amounts of sulfide ions can be used to operate the process. most desirable (if sodium sulfide is used, between 20 and 50 g/lon) gives desirable results. More people consume @ sodium Not only is it unnecessary (in the Iili case), but it is actually Detrimental to the effectiveness of the process by causing a reversal of inhibition as described above. Become.

The pulp fractions freed from the wet polishing stage are labeled as “■ stage J” in Figure 1. called, and undergoes a conditioning stage consisting of the second part of the pre-flotation conditioning. So, that The pulp is free of cyanide ions and is conditioned by sodium cyanide. , sodium cyanide is mainly used for pyrite without over-suppressing other minerals. Serves as an auxiliary inhibitor. The consumption conditions for sodium cyanide are usually 2O- 200 (!/lon) and the consumption conditions of sodium sulfide. It also depends on the properties of the ore and the processing conditions. Preferred sodium cyanide The consumption is in the range of about 20 to 100 gy” tons.It is an extremely sticky ore that resembles soil. The addition of dispersants (such as sodium silicate) along with cyanide is It is valid.

■ The pulp from the stage is roughly processed ■ Due to the new style selection flotation of the stage Conditioned with foaming agent and scavenger. Selective flotation of base metal mixed sulfides is the present invention. According to Direct Bulk) ♀ is started without selection step.

The process is thus truly a continuous (selective) flotation process. like that Selective flotation is carried out in the following left-to-right order, depending on mineral composition:

Lead - [Silver]: Copper: Zinc: Iron According to the diagram in Figure 1, or according to the diagrams in Figures 2 and 3, molybdenum: copper: iron It is.

Each metal component is activated with the appropriate amount of a special activator, Flotation is carried out after addition of appropriate amounts of special scavengers (and foaming agents).

The process is repeated until a non-flotate is obtained. If you want, essentially It is possible to eliminate debris. In the flotation method of the present invention, the prior art Smaller amounts of activator, scavenger and foaming agent are required compared to If zinc is A crude mixture (if present in arsenic ore, e.g. with copper sulfate before flotation) (If zinc and copper are present together, 5A will not be activated.) The aluminum button is preferably covered with copper ions, and the steel ions are usually covered with zinc to copper ions. Make preferential flotation difficult. From shishii, nails, the process of the present invention also involves complexation and This problem is solved by desorbing copper ions from the surface of the zinc sulfide.

The effect of suppressing the combination of sulfide, cyanogen, and monoxide is transient. metal component Once flotated and removed, the next one can be continuously , is promptly flotated.

1 (The transient effect of arsenide ions is the same as that of cyanide ions. It is desirable to adjust the time of introduction of the human ion. However, as mentioned above This can only be achieved on a case-by-case basis.

The advantages of the present invention are as follows. 1) Comparison by not using pH adjuster Use of small amounts of sulfide and cyanide ions and/or scavengers, activators and Reduced reagent costs due to use of reduced amounts of foaming agent. 2) Reduced process and equipment costs Improved selectivity of flotation while reducing reagent costs. 3) Recovery beyond normal methods improvements. 4) Improving the equal handling of ifl 3-minerals. 5) Article 3 Reduction of residence time against silicification and flotation. 6) Elimination or reduction of adverse effects. its harmful The effect is that the high consumption of the flotation reagent is due to the presence of other minerals (e.g. the presence of calcium ions is known to affect the continuous flotation of stones); In addition, the present invention eliminates extremely fine mixed sulfide grains that are normally lost in conventional methods. The collection of children (slimes) can be increased.

The present invention demonstrates the fact that it is desirable to add a pl-(modifier) such as lime to the pulp. Make it unnecessary instead of making it unnecessary. Lime is customarily added during the wet polishing stage of base metal ores. Ta. The addition of lime (to increase the pH) actually optimizes the zinc activity of the step consisting of It has been known to interfere with Maximize copper ions on top of zinc mineral particles without lime A range of pH can be manipulated for adsorption.

Apart from these considerations of maximum utilization, there are general considerations for operating the process and Large cost savings with one l)H ranging between about 5.5 and about 8.5 in nature. You can make a profit.

Non-regulation of flotation systems 1) H can vary depending on ore composition and local water quality. medium size here The thing is that +1)-1 does not need to be strictly regulated or monitored. , and thus the present process is relatively independent of IIIH.

The process is applicable to a variety of base metal mixed sulfide ores, and the ores are Lead, lead-zinc, lead-zinc monosilver, lead-zinc-copper, copper-zinc, and copper-molybdenum Not limited. Also, rocks such as coal or other ores that contain sulfides as a component of Also applicable 14 can.

In particular, the -7゛ process makes it possible to separate molybdenum from copper, and removes residual copper minerals. This is possible through four consecutive selections and selective flotation of molybdenite-copper-molybten-rich minerals. It is.

As is well known, copper-molybdenum combination mineral preparation is normally a one-step process. It is flotated in the main flotation and then sent to other equipment for further separation. standard Methods for such separation include suppressing the copper and flotating the molybdenum. usually The inhibitors used in this second flotation circuit are sodium hydrogen sulfide and cyanide. Iron chloride, sodium cyanide, Nokes reagent ( Phosphorous pentasulfide in sodium hydroxide) and arsenic Nok es) (arsenic trioxide in sodium GA) alone or in combination. There is. The consumption of such inhibitors is generally very high, from about 10 to about 50 k! ! /ton range.

Unfortunately, reagents that inhibit copper also inhibit molybdenum.

Collectively, copper-molybdenum separation requires a relatively large number of steps. copper-molybde The copper-molybdenum beneficent mineral that becomes the feed in the main separation circuit is collected from the main circuit. Other difficulties arise from the fact that they are contaminated by The main circuit is later copper suppressed necessitating the use of large amounts of copper inhibitors.

Copper mineral particles were added to increase the inhibitory effectiveness and control the reagent placement of the second circuit. There are many ways to change the surface energy, such as steaming or roasting the pulp. or matured. to render the scavenger coating harmless or remove it. has been carried out.

Furthermore, the use of the present invention achieves the advantages listed above in relation to the molybdenum content of the ore. As well as being more or less common to all major flotation circuits a) Copper-molybdenum selection with negligible copper content and (b) no copper scavenger This makes flotation possible. This means that the second separation is a number less than (a) simplified detergent steps (and/or better beneficiary grade and recovery) (b) lower reagent volumes both overall and step-by-step); This would effectively reduce the cost of processing equipment required.

Thus, when the present invention is used, in the pretreatment of copper-molybdenum containing ores, A selection method is used in the copper flotation process as outlined in Figures 2 and 3. It will be done.

(1) The scavenger is copper molybdenum beneficent according to common recent practice at point 21 in Figure 2. The bO can be removed later to obtain a substantial amount of flotation. This method is already It will provide the advantages listed above. The copper-molybdenum concentrate thus obtained is Contains the majority of molybdenum and a substantial portion of copper (approximately 90% copper and (as much as molybdenum), but the molybdenum grade is very low. Mineral beneficiation The material must be sent to a standard copper-molybdenum separator for further separation. stomach.

(2) With special reference to FIG. 3, the copper scavenger can be omitted. In that case , a small fort of copper-molybdenum concentrate is naturally floated. At that time, it started at 31 points. Simple addition of foaming agent is required 6 However, it can be added at the same time as cyanide ion. It can also be added after 32.

The recovery of molybdenum is the same as (1), but for example, if it is 1 [< However, the grade of molybdenum concentrate is substantially higher (10% higher than that in (1) above). (2), the volume of the selected mineral Ff41.1 remains substantially lower than (1).

This concentrate also needs to be sent to a separation unit for further processing. deer However, processing such as e can be carried out on a concessionary basis (without removing the captured material). ), the number of stages can be reduced, the processing equipment can be made smaller (φ), and the processing equipment can be made smaller in practice. The non-flotation material 33 containing an inhibitor of copper-molybdenum separation is passed through with a scavenger. The strips 1'1 are formed by conventional methods. Thus, further copper-molybdenum concentrate 3 /1 is obtained, which is subjected to conventional separation methods.

The use of the present invention thus exceeds that of the prior art in relation to the concentration of copper-molybdenum containing ores. Advances in Methods (within the First Copper-Molybdenum Selected Minerals 32) is added.

Sulfide ions required for the first flotation of representative copper-molybdenum ores according to the present invention. The amount of water used has been determined by changes in water consumption and specific ore compositions.

Usually necessary if sodium sulfide is used as a source of sulfur The quantity considered ranges between approximately 3 and 3 Q (1'[on, e.g. Generally required for the degree 7 of other base metal mixed sulfide ores such as lead-zinc It is much lower than what is said to be. Furthermore, the same sulfide ions are absorbed by molybdenum flotation. After being exposed, it is used to make copper minerals reactive again. cyanide ion Consumption is generally the same as in the pretreatment of other sulfide ores.

Timing and sequence of sulfide and cyanide introduction in copper-molybdenum-containing ores Regarding this, it is preferable to introduce cyanide after the introduction of sulfuric acid, and Generally, it involves a separate process.

Another economically advantageous application of the invention is the flotation of coal. Coal often turns into sulfides Therefore it is contaminated. The sulfides are usually removed using alkaline flotation in some cases. The coal is flotated through the process. The present invention eliminates alkaline flotation. , it is possible to flotate coal cheaply and with high selectivity while avoiding mixed sulfides.

Example The invention and its technical and economic advantages are briefly illustrated in the following examples. this These Examples do not limit the scope of the present invention in any way.

Laboratory tests are carried out using standard laboratory tests using 1-10 kg of different ore samples. It was carried out according to the general method described above (stage ■ - stage ■) using the facility.

18 on various ores at various locations to test the implementation of the invention. Tests were conducted under various local conditions such as water quality.

The I) Hlll obtained during different stages was recorded. No attempt was made to do so. The first observation obtained was completely based on ore composition and water characteristics. , due to their low amount, due to the hardness of certain samples or additives that are minimal. Ru.

The kpH values obtained in the tests described below are in the range of 5,5 and 85 ( Contrary to generally accepted belief and practice, process operability, particularly pH changes, shows a substantial range of insensitivity to The results are more general Generally speaking, it was advantageous to have a pH below the end of the above range.

The following examples show that the use of the present invention allows low cost flotation recovery of mixed sulfide ores to be oxidized. It has been shown that it is possible to produce commercial beneficent minerals as well as untreated sulfide ores. ing. The data reproduced below are representative of the tests conducted and are representative of the initial trials. This also included a few years of experience and was not specifically selected. Second, the final result is unsatisfactory compared to others. The values are due to factors such as lack of experimenter experience that are unrelated to the present invention.

Ore A Samples from a high grade oxidized reservoir (3amples) are approximately 35 % pyrite, 25% silver-bearing galena, 15% sphalerite, 25% quartzite. Contains gangue (Dorazon-Moji area, Potosi, Polyvia (V1lla) zon - MOJOArea, p 0jO3:, 3olivia)) The next test was to determine the potential supply for conventional factory planning from some oxidized reservoirs. Separated lead-silver and zinc considered as feedstock9 Shows the research done to obtain the luck mineral.

Excessive oxidation of the reservoir material and large amounts of lime are needed to suppress pyrite. However, before using the present invention, the ore would be difficult to process and the It makes the development of non-commercial.

The finely crushed test results of the sample, of which 80% passed through 150 meshes, are shown in Table 1 below. It is consolidated. (13- Zinc contained in the silver raw beneficent mineral is recycled into the flotation circuit. shows high flotation selectivity and recovery for all components (recycled).

0 1 Note: The above data does not require complete separation of lead from zinc. It fully reflects the conditions. Therefore, the above results are not products of optimized separation.

151 Samples from oxidized reservoirs contain approximately 30% pyrite, 8% sphalerite-iron Contains zinc ore, 1% cassiterite, 0.5% copper-flowite and gangue containing silica. Milluni Mine La Buzz Polygo 7 (Milluni Mine, La , paz, 3o1ivia).

The next test was to separate zinc and pyrite for later flotation separation of tin (tin oxide). It was carried out for the purpose of

Selective wet polishing in the presence of sodium sulfide (105 microns) In order to obtain a sample that passes 80% through the tube, it is necessary to liberate tin (stannic oxide). It has been accepted and implemented.

Reagent consumption and results are shown in Table 2 below. The results are usually used for This shows an essential separation of the ore components, which would otherwise not have been possible.

22 Bo Residence (1') Y "1 mo 1 so ー　Brother　1-剌　-〇 G field 5 Heniremi three ”　fi+===−−ゞ°8 ~=Reu, cold o, +'1. Art ■Φli. 8 works Oo OL 4-m-pa ``4N to υ 9R −151″″″−゛ 1-+) to δ ″’=”i”− ml-■・)-ωoC・ G,,=co,C0i carpet ″″″″−壬１　−°− Tomoe-I \cD L C) (n.

-ba: between -,,.

♀　　Go　　” - Steam = ““ 000 771 (fi, q ≧ Mouth, Uba ~ Incline ■　0　Se# 2'1 Miyuki 8 next I and two sides Shio To − α The above-described scheme has been made economically attractive through the use of the present invention. equipment cost The same substantial reduction in processing costs for raw zinc ore, 30% pyrite and other iron sulfides material, 2% boulansicoite and hairite (lead-silver mineral) and muscovite = quartzite. Hoarding Fake F〈Fally Fari Mine, Potosi, Polyvia〈1〈uari-Hu arl fVI! no, POjO3l, Bolivia).

Wet polished in the presence of sodium sulfide so that 80% passes 150 mesh Ta. The test method for this ore is based on the selective separation of lead 7' silver sulfide minerals - zinc beneficent minerals and pyrite. (Table 4). Continuous testing of silk-combined minerals (sulfide mineral technology and zinc) ; Leaving early (ha4 2 100 180 50 20 300 503 100 120 50 2 0 150 504 150 120 50 20 200 505 2C01 20502020050 812515050203005050101001505020300505 0 Notes The flotation pH values of all the above tests are in the range of 6.5 and 55.

Combined mineral beneficiation is the case in this example, where the flowsheet of a recent unit is a sulfide mineral-zinc selection. This was obtained because it does not allow for random selection. Thus, our results do not affect such selective separation. It does not reflect anything on the ability of the method to make a difference. However, substantially The power of this method is demonstrated by the fact that X JP yields a reasonable recovery.

5 26 Based on the results shown in Tables 4 and 5 above, the system has a production capacity of 6 200 tons (200T). Don [)iego, p on a commercial scale at a treatment plant built in Otosi (3o1ivia) The flow diagram shown in Figure 1 was used.

Begin by omitting lime and making small adjustments to residual reagents, adding sodium sulfide. No special requirements were required.

After three days of continuous testing, the results obtained in this commercial test are shown in Table 6 below.

same 326-cho 5,6948,000.5092.17II 5,33 48.00 0,50 92. +7III 5.48 44,38 1.31 78.41 3/'27 Engineering 6.09 47,50 0.65 90.57II 6,04 27,09 0.65 90.49m 6. +9 49,50 1.11 83 ．． The average 11H values for the 95 notes ranged from 5.8 to 6.2.

A comparison between the system of the present invention and a conventional system in the same plant is illustrated in Table-7.

The figures for the regular lime system represent the average from January 2, 1982 to March 24, 1982. The figures of the present invention, on the other hand, represent the average of the two consecutive days described above. statistical basis This discrepancy in the foundation should be taken into account when the results in Table 7 below are tested. be.

l Comparison of reagent reduction (zinc and pyrite section usually lime-based, untested of the present invention 11H Trial soba price L/”-Phantom Phantom-Shopper LZ”-E-shi Sulfuric acid copper 720 0.77 0,554 400 0.308z-2001 94,790,09+ 40 0,192Z-111001,530,1536 00,042 Cyanide 26 1.80 0.047 100 0.180 nat Rium Foaming agent 42 1.38 0.058 42 0.058 Lime 7,50 0 0,14 1.050... Silica acid 67 0.37 0. 025 67 0.025 Sodium Sulfurization o, 8o...150 0.1208 Savings without sacrificing product grade and recovery based on the resulting plan above (see Tables 8 and 10), the present invention It has been in continuous commercial use at the plant since May 1982.

The last entry indicates the cumulative average after 21 days of operation.

5/’27 I 6.06 47,56 0,65 9.0.51ff 5,9 6 49,96 0,25 96.291 [[5,2650,460,2595 , 725, '28 I 6. N 47,36 0,55 92.07II 6, 46 46,76 0,50 93.26I [[6,4644,760,259 6,6767'03 I 6,56 48,43 0,57 92.40II 5.99 50,80 0.41 93.91m 5.63 48,95 1. 14 81.65621 D-m 7,06 49,23 0,93 88.5 June (1-21> 6.42 47, 11 0, 72. 90.16 cumulative oil flat average 9 The observed fluctuations in reagent consumption were expected as a starting event. The fluctuation is This occurred because an operator unrelated to the present invention was not familiar with the new method. The reason for this is explained in Equation 9 below, but the recent average reagent consumption is This is a big factor. Sodium sulfide consumption decreased by 56% when comparing Table 9 with Table 7. It shows a small amount. In addition, the system at optimal conditions reduces consumption of other reagents.

Strict observation of l'lH values is no longer necessary in plant operation; equipment and facilities can be eliminated from the equipment once used with the present invention.

Table 9 Recent reagent data - 1982 sweat June average sulfuric acid steel 563 0.434 z-200440,2,11 z-11660,101 Sodium cyanide 702 0.184 Foaming agent 66 0.091 Sodium silicate 40, 0, 01530 Latest updates on the above plant based on commercial tests from June to October 1982. Information data and times using the method of the present invention for the implementation of conventional limestone circuit ores. A comparison of the road implementations is set forth in Table 10 below.

m-abuse Lime circuit Zinc% Recovery% Month Tonnes @eadS Conct T ails4982January 44 56 6.76 50.37 1.19 84.40 February 2494 9.44 49.98 1.27 88.80 March 3427 7.07 47,40 1.17 85.56 April 3723 6.11 48,96 1.43 78 ．． May 90 3127 0.52 47.06 1.39 81.07 Average 3 445 7.03 48.82 1,29 83.87 June 3035 6.5 1 47.36 0.77 89,67 July 3137 7.08 45,94 0.77 90.63 August 3694 6.93 47.50 0.68 9 1.50 September 2957 7.43 48,86 0.76 91.2010 3609 6.82 49.89 0.77 90.10 Average 3286 6 ,9! The experimental sample of mixed sulfide is 20% sphalerite, 3% galena (6oz silver/'t), 40% pyrite and Contains gangue containing silica. The size to free zinc is 80% 100 It passes through Messiu (Porco Mine, Potosi, Polyvia). Mine, potosi, 3o1ivia>),.

The effect of light flotation (lead-zinc) was evaluated in a pre-en test. However, the ore mentioned above Such separation, as in the case of C. It is unthinkable that it depends on the

The combined mineral concentrate (lead + silver + zinc) is summarized in Table 11 at unadjusted pH 6.5. It was flotated from pyrite and gangue under suitable conditions.

The results will be explained below.

2 3 The scavenger was Z-200. Foaming agent is Dowfroth 250 and is commercially available under this trademark from the Dow Chemical Company. polypropylene ether (polypropylene ether).

Each consumption was 40o/lon. Conditioning and flotation times were 5 to 10 minutes in 7'1 steps, respectively.

No testing was conducted to increase the number of units.

The above results demonstrate that essential flotation selectivity and recovery are optimal or near-optimal for 1-RIU sulfidation. 400 tons per day for 5 days. Based on the plant experiment program, it was formed with the following results.

34 (Flow sheet according to Figure 1) Sodium sulfide 5050558560...z-20050507070 7038 Sodium cyanide 75 50 70 50 60 3 Copper sulfate 300 42 0 270 360 360 672D-250451515151536 Z-1185 Lime 11,086 product (zinc%) HEADS 9,64 9,74 9.8410,44'i2.1110.3 9CON CE N T E R48,9951,6553,6350,165 4,1953,08TAILES 2.15 2.10 3.10 2.97 1.00 1.26 times Yield (%) 81.26 81.76 72.70 7 6.05 93.47 91.56 For comparison purposes, the last column is under normal (lime) system. shows plant data obtained during March 1982 (monthly average).

Ore E: An unknown mixed oxide sample from Mexico was collected in February 1982 by Mountain State Research Institute (M mountain S tgtes35!Table’a59-50 1539 (11)6 The sample contains approximately 2% lead, 2 oz silver/ton, 3% zinc and 10% iron.

The conditions and results of the eggplant test are summarized in Table 13 above.

Consolidating the above results is the fact that this was a blind test. gave substantial weight.

The above results can be extrapolated (from which these can be evaluated for industrial-scale applications in regular operations). It can be used to In addition, laboratory tests have shown that zinc This was done to further reduce iron ore threading. The above results are based on the experience of those skilled in the art. This shows over-activation due to copper, which can be improved.

Ore F: Mine mixed sulfide trial 1 contains approximately 0.18% lead, 8.4% zinc and 1 Contains 01296 iron sulfides (in weight percent). 85% of the test methods are 65 mesh Wet polished until it passes. The reagents used, test methods and results are shown in Table 14 below. Summary on page 17. It shows substantial recovery and selectivity7 38 39--1 Zinc Ro Conc, 14.5B, 10 51.67 8.39 89.59 Zinc Sc Conc, 3.12. 13 12,52 2.33 4.64 Zinc Pr1m, Conc, 17.70. 11 44, 77 10.72 94.2 Iron trisulfide Ro Conc, 7,84. 08 i, 50 3.61 1.40 Non-flotation material 70, 17. 04. 40 16.15 3,34HEADS 1 00.00. 174 g, 41 100.00 100.00 Condition ■5' ...Song 1oog/ton Sodium lead cyanide Cond, /Flot, 5' 15'---20M ton A-24215g/ton Foaming agent Table 17 Ikusokogi Satoyo Sato - Sakai set up! @ Plate general lead Ro Conc, 5.61 2,48 3.05 72.03 2j4 Zinc Ro Cone, 12,87. 07 55.38 4.67 89.40 Zinc SCC0nC,4,23,202 ,884,381,53 Zinc Pr1m, Conc, 17,10. 10 42. 40 9,05 90.93 Iron sulfide Ro Conc, 9.36. 10 4 , 09 4.85 4.80 Non-flotation material 67.94. 04. 25 14.0 8 2.13 HEADS 100.00. 193 7.97 100.00 100.0040- 艮一block 王l"υ-"dan 艮粂工Q danots M工 Y 連＠　8　・・・・・・10 0(+/ton Sodium lead sulfide Cond, /Flot, 515 7.5 20Q/ton A-24215g/ton Foaming agent Conditioning 3 10.9 1330g/ton Lime zinc Rougher Cond, /Flot, 5/2 10.7 (15a/ton foaming agent) 465g /ton copper sulfate.

50g/ton z-14 Zinc Sc, F lot, 3...7.5! +/ton Foaming agent Iron sulfide R.

Cond, /Flot, 315-----・15Q/ton Foaming agent.

50g/ton z-6 1 Table 17 shows the results obtained with the use of lime and is explained for comparison purposes with the above. .

Ore G: Don Diego, Potosi Zinc obtained in Bolivia (35% sphalerite, 20% pyrite) Contains. Processed according to FIG. l)H of the natural ore was 5.5.

Tile top too Weight (tons) Zinc% Zn distribution% 1st F eed 143,65 8.02 100.00Conct, 40 ．． 65 56,57 88.85T ai l 103,00 2.80 11 ．． 1521EI F eed 114,88 18.40 100.00Con ct, 34.54 56.09 91,67T ai l 80.34 2. 19 8.333rd F eed 95,71 18.79 100.00Co nct 31,74 53.73 94.81T ai l 63,97 1, 46 5.19 Reagent consumption: Sodium sulfide 75(]/l; Sodium cyanide 149g/l; Copper sulfate 108 8g, /l: Z-20075 (1/l; z-61030/l; Foaming agent 34g/l42 The special application of the invention to copper-molybdenum beneficiation is further illustrated in the following additional examples. I will explain further.

Ore H: Samples include pyrite, molybdenite, chalcopyrite, and quartz monzonite porphyry copper ore. It consists of finely dispersed chalcocite.

During all tests, 80% of the ore passed through a 100-mesh sieve. It was trained. The results and conditions for the first two tests are explained in Tables 18 and 19 below. However, according to Figure 2, one includes no lime and one includes flotation induced by lime. However, the results and conditions for the last two tests are explained in Tables 20, 21, and 22 below. However, as shown in Fig. 3, it is possible to collect using a combination of sodium sulfide and sodium cyanide. Includes no agent. Flotation without a scavenger using the present invention is carried out using 19 good grades of molybdenum. Give raw mineral concentrate.

Finally, Table 23 shows the results for comparison purposes without the use of sodium cyanide and without scavenger. Summarize flotation. Table 23 shows good molybdenum-copper separation but poor copper- It shows pyrite separation.

3 Molybdenum Ro, Conc, 2.08. 42. 79 5.91 10. 82 Pyrite Ro, Conc, 1.63. 45. 81 4, 97 8.6 9 Non-flotation material 93,92. 014. 032 8,90 19.79Head s 100,00. 152. 148 100.00 100.00 Conditionalization I 5 7.3 Mo’) 7 Te> Ro, 5 7.9 100 Sodium silicate Flot, 7 5 Sodium cyanide 15 Foaming agent (MIBC) fa Ro, 515 7.5 Foaming agent (MIBC) (Cond, /Flot, ) 5 (1331') ※※Yellow iron ore Ro, 515 7.5 Foaming agent (M IBC) (Cond, /Flot, > 50 (Z-6) Footnote At a given polishing size, fine tone and about 80% release of molybdenum were obtained. ※※ Minerec 1331 is a copper scavenger.

Table 19 Conditioning I 5 10.7 500 Lime molybdenum-copper 3 cav, f-lo t 5*Molybdenum-copper scavenger (Flilaps 66 Co,) Molybdenum R o, Flot 5 Table 22 Molybdenum Ro, Conc, 1,65 3,66 2.12 59.41 2 7.96 Molybdenum 5cav, Conc, 89. 99 2, 20 8, 6 1 15.55 Copper Ro, Conc, 1.36. 48 1.74 6,40 18.86 Copper Sc, Conc, 54. 46. 83 2.44 3. 59 Pyrite Ro, Conc, 2.36. 13. 70 3,01 13. 20 Non-flotation material 93.20. 022. 028 20,13 20.83He ads 100,00. 102. 125 100,00 100.00 conditions Chemical ■ 3 25 (sodium sulfide) Condition I [325 (sodium cyanide) 1 5 (foaming agent) Molybdenum Ro, Flot 5 Molybdenum 3cav, Cond, Flot, 515 7.5 (foaming agent), 1o ( Fuel oil) Copper Ro, Cond, Flot, 315 15 (foaming agent), 5 (Z -14) Copper 3c COr+d, FIot 315 7.5 (foaming agent), 5 (Z-14> Pyrite Ro, Cond, Flot 315 15 (foaming agent), 25 (Z-6) Molybdenum Rour+herConc, 98 9,25 ．． 64 72.65 6.00 Molybdenum 5cav, Conc, 55 1 ．． 46. 65 6.47 3.47 Copper Ro, Conc, 69. 32 1.45 1,76 9.56 Copper Sc, Conc, 1,10. 42. 82 3,71 8.67 Pyrite Ro, Conc, 2,04. 11 2.22 1.79 43.34 Non-flotation material 94.63. 018. 032 13.6 1 28.97 Heads 100.00. 125. 105 100.00 100.00''-1 hour (min)'' ratio reagent (g/'ton) 10x polishing 5.5 60 (sodium sulfide) condition 3 20 (sodium sulfide) Molybdenum 7.5 7,4 7.5 (foaming agent) Ro, F lot Molybdenum 5/7,5 2.5 (foaming agent) 3 cav, Cond, F l ot, 7 (fuel oil) copper 3/10 5 (z-14) Ro, Cond, F lot.

Copper 315 2.5 (foaming agent) Sc, Cond, F lot, 2 (z-14) Pyrite 315 30 (z -6) RO, Cond, Flot.

theoretical calculation Typical concentrations of 0.7% copper and molybdenum for copper-molybdenum-containing ores according to the prior art 0.015% Nissan 20. Processing OOO tons. The main flotation is Nissan 476t Bulk copper-molybdenum containing 25% copper and 0.536% molybdenum Produces selected minerals. The recovery of molybdenum is 85%. Main points according to Figure 3 The flotation method uses 85 tons of molybdenum per day containing 3% molybdenum and 3% copper. It only produces flotsam.

In addition, the 85 tonne daily production is essentially without complement, and without complement removal or modification. It eliminates the need for

Figure 1 Figure 2

Claims (1)

[Claims] 1. Polish the ore to form ore pulp and remove sulfide ions and cyanide ions. The concentration of sulfide ions is the same as the base metal mixed sulfide. to a level sufficient to inhibit but insufficient to substantially activate the metal sulfide minerals. The concentration of cyanide ions is controlled by the flotation process. at least sufficient to supplementally suppress the mineral content of the ore required for level, but not sufficient to control over-suppression of the above mineral components; The above sulfide ions and the above cyanide ions are added in a predetermined succession for a predetermined time before flotation. A method for separating mineral components by flotation, which comprises introducing into pulp. 2. The sulfide ions are introduced during polishing of the ore, and the polishing is wet polishing. The method according to claim 1, characterized in that: 3. The cyanide ions are introduced into the pulp after the sulfide ions are introduced. The method according to claim 2, characterized in that: 4. The cyanide ions are removed in the conditioning operation following the wet polishing. 4. Process according to claim 3, characterized in that it is introduced into the pulp. 5. The above process is carried out substantially without pH adjustment. A method according to any one of claims 1 to 4. 9 6. A patent claim characterized in that the above process is carried out in one unregulated DH A method according to any one of items 1 to 4 in the range 1 to 4. 7. The above ore is a complex salt containing at least two metals: lead, copper, silver, zinc, and iron. It is a base metal mixed sulfide ore, and the process is further enhanced by complementing agents and foaming agents. Next to the pulp conditions, the value of the above ores is determined in the order of lead-[silver]: copper: zinc: iron. Claim 1, characterized in that the method is carried out by direct selective flotation of mineral components. A method according to any one of paragraphs 4 to 4. 8. The above mineral is copper-molybdenum ore, and the process further includes copper scavenging agent and After conditioning the pulp with a foaming agent and a foaming agent, flotation of the copper-molybdenum beneficent mineral is carried out. According to any one of claims 3 and 4 characterized in that How to read. 9. The above mineral is copper-molybdenum ore, and the process is roughly copper-molybdenum ore. The patent claim is characterized in that it consists of flotation without a direct complementing agent following a deconcentrated mineral. A method according to any one of Scopes 3 and 4. 10. The ore is coal, and the process further includes adding a foaming agent and a foaming agent to the pulp. Introducing a complementing agent to flotate the coal while leaving the sulfides in the gangue. Any one of claims 1 to 4, characterized in that One method. 11. The above sulfide ions include sodium sulfide, potassium sulfide, and sodium hydrogen sulfide. given by one chosen from the group consisting of 50 8. A method according to claim 7, characterized in that: 12゜ The above cyanide ions are sodium cyanide, potassium cyanide, sia A patent claim characterized in that it is provided by one selected from the group consisting of copper oxides. The method described in item 11. 13. characterized in that the sulfide ion is provided by sodium sulfide 13. The method according to claim 12. 14. The above cyanide ion is provided by sodium cyanide. A method as claimed in claim 13. 15. The above sodium sulfide consumption range is between about 20 and 200 g/ton. Any one of claims 13 and 14 characterized in that method. 16. What about the above sodium cyanide? ? ! The range of li is about 25 to 200! +/ 16. The method according to claim 15, wherein the method is between lon and lon. 17. The above sulfide iron is sodium sulfide, potassium sulfide, and hydrogen sulfide. A patent claim characterized in that it is granted by one selected from the group consisting of The method according to item 8. 18. The above sulfide ions include sodium sulfide, potassium sulfide, and sodium hydrogen sulfide. Claims characterized in that they are defined by one selected from the group consisting of: The method described in paragraph 9. 19. The above cyanide ions include sodium cyanide, potassium cyanide, and cyanide. A characteristic characterized by being given by one selected from the group consisting of anodized copper. A method according to any one of claims 17 and 18. 20. The sulfide ion is provided by sodium sulfide. A method according to any one of claims 17 and 18. 21, characterized in that the cyanide is provided by sodium cyanide; 21. The method according to claim 20. 22. The above sodium sulfide consumption is in the range of about 20-500/lon 21. The method according to claim 20, characterized in that: 23. The above sodium cyanide consumption is in the range of about 20-100 (1/lon). 22. A method according to claim 21, characterized in that: 24, characterized in that the above process is carried out in substantially unregulated l)H; The method according to claim 8. 25. A special feature characterized in that the above process is carried out at substantially unregulated pH. The method according to claim 9. 26. characterized in that the above process is carried out in substantially unregulated [lH] The method according to claim 7. 27, characterized in that the above process is carried out with substantially unregulated I)H. The method according to claim 10. 28. A special feature characterized in that the above process is carried out at substantially unregulated pH. A method according to any one of claims 24 to 27. 29. Polishing ore to form ore pulp and removing sulfide The sulfide ions and cyanide ions are mixed into the pulp at an effective concentration. and cyanide ions are introduced into the pulp for a predetermined time and in a predetermined succession before flotation. This reduces reagent volumes, improves flotation selectivity, increases recovery, and improves beneficiary mineral grade. characterized by bringing about at least one of the following: improvement, conditioning and reduction of residence time A method of separating ore components by flotation.